Defn: An imponderable substance or body; specifically, in the plural, a name formely applied to heat, light, electricity, and magnetism, regarded as subtile flyids destitute of weight but in modern science little used.
IMPONDERABLENESS
Im*pon"der*a*ble*ness, n.
Defn: The quality or state of being imponderable.
IMPONDEROUS
Im*pon"der*ous, a.
Defn: Imponderable. [Obs.] Sir T. Browne.
— Im*pon"der*ous*ness, n. [Obs.]
IMPONE Im*pone", v. t. Etym: [L. imponere, impositum, to place upon; pref. im- in + ponere to place. See Position.]
Defn: To stake; to wager; to pledge. [Obs.] Against the which he has imponed, as I take it, six French rapiers and poniards. Shak.
IMPOOFO
Im*poo"fo, n. (Zoöl.)
Defn: The eland. [Written also impoofoo.]
IMPOON
Im*poon", n. (Zoöl.)